Cisco Cisco TelePresence Video Communication Server Expressway 관리 매뉴얼
A structured dial plan minimizes the number of queries issued when a call is attempted. However, it still requires a
fully connected mesh of all VCSs in your deployment. A hierarchical dial plan can simplify this.
fully connected mesh of all VCSs in your deployment. A hierarchical dial plan can simplify this.
Hierarchical dial plan
In this type of structure one VCS is nominated as the central directory VCS for the deployment, and all other VCSs are
neighbored with it alone.
neighbored with it alone.
The directory VCS is configured with:
■
each VCS as a neighbor zone
■
search rules for each zone that have a Mode of Alias pattern match and the target VCS's prefix (as with the
structured dial plan) as the Pattern string
structured dial plan) as the Pattern string
Each VCS is configured with:
■
the directory VCS as a neighbor zone
■
a search rule with a Mode of Any alias and a Target of the directory VCS
There is no need to neighbor every VCS with each other. Adding a new VCS now only requires changing
configuration on the new VCS and the directory VCS. However, note that it may be necessary to neighbor your VCSs
to each other if you are using device authentication — see below for more information.
configuration on the new VCS and the directory VCS. However, note that it may be necessary to neighbor your VCSs
to each other if you are using device authentication — see below for more information.
Also, failure of the directory VCS in this situation could cause significant disruption to communications.
Consideration should be given to the use of
Consideration should be given to the use of
H.323 calls and optimal call routing
is enabled you must ensure that all search rules are configured with a Source
of Any. If the Source is configured to All zones, H.323 calls will fail to connect. This is because the H.323 SETUP
message, having followed the optimized route established by the original LRQ or ARQ, will appear to the target VCS
as coming from an unknown zone. SIP calls, however, are successfully routed if the search rule Source is All zones
(because in SIP the search and call setup is combined into one message).
message, having followed the optimized route established by the original LRQ or ARQ, will appear to the target VCS
as coming from an unknown zone. SIP calls, however, are successfully routed if the search rule Source is All zones
(because in SIP the search and call setup is combined into one message).
Hierarchical dial plan (directory VCS) deployments and device authentication
your authentication policy within a hierarchical dial plan.
About Zones
A zone is a collection of endpoints, either all registered to a single system or located in a certain way such as via an
ENUM or DNS lookup. Zones are used to:
ENUM or DNS lookup. Zones are used to:
■
control through links whether calls can be made between your local subzones and these other zones
■
manage the bandwidth of calls between your local subzones and endpoints in other zones
■
search for aliases that are not registered locally
■
■
You can configure up to 1000 zones. Each zone is configured as one of the following zone types:
■
: a connection to a neighbor system of the local VCS.
■
: the local VCS is a traversal client of the system being connected to, and there is a firewall
between the two.
■
: the local VCS is a traversal server for the system being connected to, and there is a firewall
between the two.
■
: the zone contains endpoints discoverable by ENUM lookup.
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Cisco TelePresence Video Communication Server Administrator Guide
Zones and Neighbors